Which of the following factors affect how likely you are to be okay with the death of a protagonist?
Whether there are other protagonists I like to continue the story
Whether there are other previously non-protag secondary characters who seem capable of picking it up
Whether it fits the character's arc, dammit
How old the character is
How culpable the character is
Whether it is permanent or temporary
Where it falls in a book (middle or end)
Where it falls in a series (middle or end)
Whether I like the character
Whether I find the character interesting
Whether there is much or little denouement
What is going on in my own life at the time I first read the story
I never like protagonists dying.
I always like protagonists dying. Also other characters. The more doom the better.
Something else I will kindly explore in comments
PS No, I am not thinking of killing off Carter. As far as I know, Carter does not die. Bullets can't...wait, that's something else.